Count On/Count Back
Mrs. Maskell plants 9 flowers. Mr. Maskell plants 4 flowers. How many flowers did they plant in all?
Use a count on strategy to solve.
9, 10, 11, 12, 13
They planted 13 flowers in all.
Show how to find a sum of 9+7 by making a 10. Then fill in the equations.
9 + 7 = ___
10 + ___ = ___
9+7=16
10+6 = 16
James has some hockey cards.
He gives 4 hockey cards to his sister.
Now James has 10 hockey cards.
How many hockey cards did James have to start?
Write the equation to solve.
6 + 4 = 10
The team has 6 players. 2 players quit. After that, 5 players join the team.
How many players does the team have now?
Use the numbers below to complete both equations to solve the problem.
2, 4, 5, 9
6 - ___ = ___
4 + ___ = ___
6 - 2 = 4
4 + 5 = 9
The team has 9 players now.
Write YES or NO to show if 9 will make the equation true.
3 + ___ = 14
NO
3 + 11 = 14
7 friends go to the movies. They have 4 tickets. How many more tickets do they need?
Use a count back strategy to solve.
7, 6, 5, 4
They need 3 tickets.
Show how to make a 10 to find 17-4. Then complete the equation.
17 - 4 = ___
17-4=13
Scott found 9 shells at the beach. Diana found 7 shells. How many shells did they find in all?
9 + 7 = 16
They found 16 shells in all.
Ryan has 5 trophies. Diana has 1 more trophy than Ryan. Write an equation to show how many trophies they have in all.
5 + 5 + 1 = 11
OR
5 + 6 = 11
Write YES or NO to show if 7 will make the equation true.
15 - ____ = 8
YES
15 - 7 = 8
Show how to find a sum of 8+5 by making a 10. Then fill in the equations.
8 + 5 = ___ 10 + ___ = ___
8 + 5 = 13
10 + 3 = 13
Cole has 7 apples. He buys some more apples. Now he has 12 apples. How many apples did Cole buy?
Draw a picture and write an equation to solve the problem.
Cole bought 5 apples.
Write an equation that has a difference of 6.
Sample: 9 - 3 = 6
Write YES or NO if 5 will make the equation true.
____ + 13 = 18
YES
5 + 13 = 18
Frank ate 6 fewer pieces of chocolate than Maria. Maria ate 15 pieces of chocolate. How many pieces did Frank eat?
Draw a picture to model the problem. Write an equation to solve.
15 - 6 = 9
Frank ate 9 pieces of chocolate.
Which have a sum of 13? Write the letter of ALL that apply:
A. 6 + 7
B. 5 + 9
C. 7 + 6
D. 10 + 3
A, C, D
Write YES or NO if 4 will make the equation true.
12 - 7 = ____
NO
12 - 7 = 5
Ethan had 4 pencils, 6 crayons, and 3 erasers in his pencil case. How many school supplies did he have in his pencil case in all? Write an equation to solve the problem.
4 + 6 + 3 = 13
Ethan had 13 items in his pencil case.
Which have a difference of 9? Write the letters of ALL that apply:
A. 11 - 3
B. 18 - 9
C. 11 - 2
D. 10 - 1
B, C, D
Write YES or NO to show if 7 will make the equation true.
14 - ___ = 7
YES
14 - 7 = 7